/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.editor;

import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.*;

/**
 * This ClassVisitor deletes attributes with a given name in the program classes, fields, methods, or code attributes
 * that it visits.
 *
 * @author Eric Lafortune
 */
public class NamedAttributeDeleter extends SimplifiedVisitor implements ClassVisitor, MemberVisitor, AttributeVisitor {
    private final String attributeName;

    public NamedAttributeDeleter(String attributeName) {
        this.attributeName = attributeName;
    }

    // Implementations for ClassVisitor.

    public void visitLibraryClass(LibraryClass libraryClass) {}

    public void visitProgramClass(ProgramClass programClass) {
        new AttributesEditor(programClass, false).deleteAttribute(attributeName);
    }

    // Implementations for MemberVisitor.

    public void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember) {}

    public void visitProgramMember(ProgramClass programClass, ProgramMember programMember) {
        new AttributesEditor(programClass, programMember, false).deleteAttribute(attributeName);
    }

    // Implementations for AttributeVisitor.

    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}

    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) {
        new AttributesEditor((ProgramClass)clazz, (ProgramMember)method, codeAttribute, false)
            .deleteAttribute(attributeName);
    }
}